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A. D. CATLIN. Damper Regulator.

No. 224,758. I Patented Aug. 31,1880.

h UNTTED STATES PATENT OFFICE.

ABEL D. OATLIN, OF BAY CITY, MICHIGAN, ASSIGNOR OF ONE-THIRD OF HIS RIGHT TO SMALLEY BROTHERS & 00., OF SAME PLACE.

DAMPER-REGULATOR.

SPECIFICATION forming part of Letters Patent No. 231,758, dated August 31, 1880.

To all whom it may concern:

Be it known that I, ABEL D. OATLIN, of

Bay City, in the county of Bay and State of 1 V Michigan, have invented an Improvement in Damper-Regulators,.of which the following is a specification.

The nature of my invention relates to new and useful improvements in the construction of devices for regulating the dampers of steam- 1 1o generators; and my invention consists in the combination, with a hollow cylinder connected with a steam-pipe and provided with a hollow piston, of an inclined lever having. a weight adjustable thereon and a rod connecting the outer end of said inclined lever with a dampercrank, whereby less steam-pressure is required to operate the damper when the weight is at its lowest point and the damper fully open, and more steam-pressure is requisite to close the damper when the wei ghtis higher, as hereinafter more fully set forth.

Heretot'ore in similar devices for operating the damper by steam-pressure the lever carryr in g the adjustable weight has been generally ar- 2 5 ranged horizontally, and the amount of steam pressure to operate the dam per has been regulated by adjustingthe weightat different points on the horizontal lever. By the employment of an inclined lever carrying the adjustable weight, as in my construction, but little steampressure is required to operate the lever when the weight is at its lowest point and the damper fully open, and as the weight is gradually raised it requires aconstan tly-incrcased steampressure to raise it until the damper is closed.

Heretot'ore, also, 'a horizontal lever carrying a movable weight and having pivoted to its outergend an inclined lever carrying a second movable weight has been employed, which second weight is caused to move outward from the fulcrum ol" saidllever as the latter rises 'under'fan excessive'fsteam-pressure. This device, however, requires two levers and weights and a stop to be employed, while in myinvention a better result is obtained by the use of a single lever, as hereinafter shown.

Figure l is an elevation of my improved device in [the position before its action is required. Fig. 2 is a vertical central section of Application filed February 9, 1880.

the same in the position required to close the damper.

In the accompanying drawings, which form a part of this specification, A'represents a cylinder open at top, its lower end terminating in a threaded chamber, a, by means of which it may be secured to any steam-pipe wherein the steam or pressure is the same to the square inch as is developed in the generator to which it is attached. Near the lower end of this cylinder there is cast thereon, or rigidly secured 6o thereto, an ear, I), which supports the post 0, in the top of which is pivoted one end of the lever B. e

U is a hollow piston, the lower extremity of which is closed with an outer flat surface, which seats itself upon the opening leading from the pipe before mentioned into the cylinder Al The interior bottom surface of this hollow piston is concave or cup-shaped, as shown at d, for the purposes hereinafter described.

D is a rod pivoted to the lever B, which hangs within the hollow piston loosely, and when the latter is raised the lower end of the rod fits in the cup-shaped portion a of the hollow cylinder as the latter rises under the increasing pressure of steam. This lever B is curved downward, substantially as shown, and is provided with an adjustable weight or ball,

E, secured thereto by means of the set-screw e.

The outer end of the lever B is connected by the rod F with the crank of the damper in the smoke-stack.

What I claim as my invention is- The combination, with the hollow'eylinder A, of the hollow piston 0, rod D, inclined lever B, weight E, adjustable on the inclined lever, and rod F, connecting the lower end of said lever with the damper-crank, whereby less steam-pressure is required to operate the damper when the weight is at its lowest point and the damper fully open, and more steampressure is required to close the damper when the weight is higher, substantially as described.

ABEL D. OATLIN. Witnesses:

H. S. SPRAGUE, CHARLES J. HUNT. 

